Testimonials

See the opinions of students and educators just like you. Select from the following to learn more.

Let Your Students Explore with CK-12!
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Let Your Students Explore with CK-12!
Using CK-12 Every Day in Class
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Using CK-12 Every Day in Class
Instantly See CK-12 Content in More Than 90 Languages
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Instantly See CK-12 Content in More Than 90 Languages
Customizing CK-12 with Regional Content
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Customizing CK-12 with Regional Content
Save Money and Own Your Standards with CK-12
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Save Money and Own Your Standards with CK-12
Sharing CK-12 with Google Classroom and More
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Sharing CK-12 with Google Classroom and More
Why Teachers Love CK-12 FlexBooks®
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Why Teachers Love CK-12 FlexBooks®
CK-12's Free, Platform-Agnostic System for Finding and Editing OER Content
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CK-12's Free, Platform-Agnostic System for Finding and Editing OER Content
CK-12's PLIX and Interactives Help Students to Work Together
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CK-12's PLIX and Interactives Help Students to Work Together
CK-12 Made My Job Easier!
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CK-12 Made My Job Easier!
"I Use CK-12 Videos Whenever Possible"
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"I Use CK-12 Videos Whenever Possible"
CK-12 Meets and Exceeds Standards Requirements
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CK-12 Meets and Exceeds Standards Requirements

Comments from Educators

Me ha ayudado a planear clases más interesantes para mis estudiantes.

Danelly M.

An invaluable resource for learning materials.

Dan P.

I learned about CK-12 this year from the previous science teacher in my position at my new school. I have used CK-12 resources for all three of the subjects that I teach and my students just recently told me they would rather use CK-12 than Khan Academy.

Dan M.

ck12 is outstanding with providing information, testing material and questions for students to improve their learning in biology. thank you

Cyril F.

CK-12 is an amazing site to use to help students understand topics better, and it has helped me through my earth space honors class. Thanks so much!

Dalila Z.
Dairy D.

Love the ability to customize lessons!

dabourd

This cite allows me to provide practice for my students that isn't always just another worksheet. We all like the immediate feedback that this site provides.

Daire M.

I use ck-12 in my classroom. The school does not provide textbooks for the students, so I use the textbooks from ck-12.org for all of my classes except for AP Physics.

Cynthia B.

There have been available lessons that have helped my students have a better understanding of the material.

D. Ferrell

Comments from Students

I am a school admin. and I am interested in learning more about Flex books.

Leslie

CK-12 has helped us with our homeschooling and letting my daughter move at her own pace.

Leigh

CK-12 really helped me last year teaching 7th grade social studies. The content, which was broken down by standard, helped me and my students get a better understanding of the material.

Layne B.

free books!!!

Lauryn C.

It has helped me with transitioning in a block schedule to incorporate NGSS lesson.

Laurie R.

It's easy to create assignments for my students and I love that they don't discriminate the fact that I homeschool my children and use this.I hope in the future they have more english to use.Thank you.

Laurisa N.

CK-12 has been a great help daily as I integrate it into my Biology and Environmental Science Classes. My students love it and I can not thank the developers enough for making student & teacher friendly resources

Laurette S.

I have been able to take the real world applications and interesting topics from ck-12 and incorporate them into my science lessons.

Lauren H.

My students love the videos and information on this site. I feel that it greatly enhances student learning.

Laura M.

cK-12 has helped me teach my child on several subjects. It is a fantastic resource weather you homeschool or not.

Laura G.